| Mary Beth Dunnichay | |
| Country: | United States |
| Birth Date: | 25 February 1993 |
| Birth Place: | Elwood, Indiana, U.S. |
| Hometown: | Elwood, Indiana, U.S. |
| Training: | Indianapolis |
| Event: | 10m, 10m synchro |
| Natlteam: | 2006, 2007, 2008 |
| Club: | National Training Center |
| Collegeteam: | Purdue University |
| Partner: | Anna James |
| Former Partner: | Haley Ishimatsu |
| Coach: | John Wingfield |
Mary Beth Dunnichay (born February 25, 1993, in Elwood, Indiana) is an American platform diver. Her older brother Caleb is also a competitive diver for Auburn University.
She was named to the 2008 U.S. Olympic team in both the 10-meter platform and the synchronized 10-meter platform event with Haley Ishimatsu.[1] In the synchronized competition Ishimatsu and Dunnichay earned fifth place scoring 309.12.[2]
In May 2012, the city of Elwood, Indiana, Dunnichay's hometown, renamed their city pool Mary Beth Dunnichay Aquatic Center.[3]